Ukuba ukhe wasebenzisa unxibelelwano lweRF (irediyo), iinethiwekhi zeselula, okanye iinkqubo ze-eriyali, unokuhlangabezana negama elithi LMR cable. Kodwa yintoni kanye kanye kwaye kutheni isetyenziswa ngokubanzi kangaka? Kweli nqaku, siza kuphonononga ukuba yintoni intambo ye-LMR, iimpawu zayo eziphambili, kwaye kutheni ilukhetho olukhethwayo lwezicelo zeRF, kwaye siphendule umbuzo 'Yintoni intambo ye-LMR?'.
Qonda i-LMR coaxial cable
Intambo ye-LMR yintambo ye-coaxial eyenzelwe ukusebenza okuphezulu, ukuhanjiswa komqondiso welahleko ephantsi kwiinkqubo zeRF. Iintambo ze-LMR zenziwe yiTimes Microwave Systems kwaye zidume ngokukhusela kwazo, ilahleko yomqondiso ophantsi, kunye nokuqina, zizenza zilungele unxibelelwano olungenazingcingo ngeGPS, Ukhetho olufanelekileyo lweradar kunye nezinye iinkqubo ezisekwe kwiRF. Ngokungafaniyo neentambo ze-coaxial zendabuko, iintambo ze-LMR ziyilwe zinemigangatho emininzi yokukhusela kunye nezixhobo ze-dielectric ukuqinisekisa imfezeko yomqondiso engcono. Ziza ngobukhulu obahlukeneyo ukukhetha kuzo, njenge-LMR-195, LMR-240, LMR-400, kunye ne-LMR-600, nganye yenzelwe ukusetyenzwa kwamandla ohlukeneyo kunye neemfuno zokulahleka komqondiso.
Iimpawu eziphambili ze-LMR coaxial cable
Iintambo ze-LMR zigqamile kwibala leentambo ze-coaxial ngenxa yesakhiwo sazo esisodwa kunye neenzuzo zokusebenza:
1. Ukulahleka komqondiso ophantsi
Enye yezona zinto ziluncedo kakhulu kwiintambo ze-LMR ezinokulahleka komqondiso ophantsi kukuthomalalisa kwabo okuphantsi kumgama omde (ukulahleka komqondiso). Oku kuphunyezwa ngomgangatho ophezulu we-dielectric insulation kunye nokukhusela, okunciphisa ukulahlekelwa kwamandla xa iimpawu zidlula kwiintambo.
2. Ukusebenza kakuhle kokukhusela
Uyilo lwentambo ye-LMR inamaleko akhuselayo amaninzi, okubandakanya ukukhuselwa komcu we-aluminium kukhuseleko lwe-EMI (ukuphazamiseka kombane). Ukuluka isikhuselo sangaphandle kwandisa ukuqina kwaye kunciphisa ngakumbi ukuphazamiseka. Esi sikhuselo siqinisekisa imiqondiso eyomeleleyo necacileyo, isenza iintambo ze-LMR zibe lolona khetho lufanelekileyo kwii-aplikeshini zeRF ezinovakalelo.
3. Ukuqina kunye nokumelana nemozulu
I-Times Microwave Systems ivelisa iintambo ze-LMR, ezineshefu yangaphandle eyomeleleyo eyenziwe nge-polyethylene (PE) okanye i-thermoplastic elastomer (TPE), iyenza ikwazi ukumelana nemitha ye-ultraviolet, ukufuma kunye namaqondo obushushu agqithisileyo. Ezinye iinguqu, ezifana ne-LMR-UF (Ultra Flex), zibonelela ngoguquko olongezelelweyo lofakelo olufuna ukugoba rhoqo kunye nokunyakaza.
4. Ufakelo oluguquguqukayo nolufanelekileyo
Xa kuthelekiswa neentambo ze-coaxial eziqinileyo zendabuko, iintambo ze-LMR zinokuguquguquka okuphezulu kunye nokukhanya, okwenza ukufakela kube lula. Iradiyasi yabo yokugoba incinci kakhulu kuneentambo zeRF ezifanayo, ezivumela ukufakwa okuqinileyo kwiindawo ezivaliweyo.
5. Ukuhambelana nezixhumi zeRF
Iintambo ze-LMR zixhasa izihlanganisi ezininzi, kubandakanywa izihlanganisi zohlobo lwe-N (ezidla ngokusetyenziswa kwi-eriyali kunye nezicelo zeRF). Isixhumi se-SMA (yeendlela ezingenazingcingo kunye ne-GPS). Isinxibelelanisi se-BNC (esidume kwezosasazo kunye nothungelwano). Oku kuhambelana kubenza baguquguquke kakhulu kumashishini ahlukeneyo.
Usetyenziso oluqhelekileyo lweeNcingo ze-LMR
Ngombulelo ekusebenzeni kwayo okugqwesileyo, iintambo ze-LMR zisetyenziswa kakhulu kumashishini axhomekeke kunxibelelwano lweRF. Ezinye zezona zicelo zixhaphakileyo zibandakanya uthungelwano lwamacingo kunye neeselula, i-eriyali kunye neenkqubo zeRF, i-GPS kunye nonxibelelwano lwesathelayithi, izicelo ze-aerospace, iinkqubo zokubeka iliso kunye nokhuseleko.
Khetha intambo ye-LMR echanekileyo
Ukukhethwa kohlobo oluchanekileyo lwentambo ye-LMR kuxhomekeke kwizinto ezininzi, kubandakanya ukuphindaphinda, umgama, ukuphatha amandla, kunye neemeko zokusingqongileyo. Nazi ezinye iinketho eziqhelekileyo:
I-LMR-195 kunye ne-LMR-240: Ifanelekile kwizicelo ezifutshane ezifana ne-antenna ze-Wi Fi kunye neenkqubo ze-GPS.
I-LMR-400: Ilahleko ephantsi yoluhlu oluphakathi ukhetho oluqhelekileyo olusetyenziswa kwiisistim zeselula kunye neendlela ezimbini zerediyo.
I-LMR-600: Ilungele kakhulu izicelo ezikude apho ukulahleka komqondiso kufuneka kuncitshiswe kakhulu.
Ukuba ufuna ukuguquguquka kwezicelo zeselula, intambo ye-LMR-UF (Ultra Flex) ikwalukhetho oluhle.
Ixesha lokuposa: Mar-13-2025